Recognizing the need for an improved method of measuring the density of thin layer asphalt overlays, Troxler developed the first true thin-layer density gauge, the 4640-B Surface Thin-Layer Density Gauge.
Designed to measure the density of thin asphalt and concrete layers from 2.5 to 10 cm (1 - 4 inches), the Troxler Model 4640-B Thin-Layer Density Gauge accurately measures the overlay density without influence from underlying material. No nomographs or manual corrections are required in order to compute the true density of the overlay. With onsite results available in as little as one minute, the Model 4640-B can provide the user with test results when they are needed, not hours after compaction has been completed.
Gauge Precision ±1 std. deviation at 2240 kg/m3 [140 pcf])
110/220 VAC, 50-60 Hz or 12-14 V DC
4x16 alpha-numeric LCD
The Model 4640-B provides you with these advantages: